Kinetic study of the b ® a + g transformation reaction in a CuZnAl alloy.

G. DE MICCO; A. E. BOHÉ; D. M. PASQUEVICH

ZEITSCHRIFT FUR METALLKUNDE

Max-Planck-Gesellschaft zur Förderung der Wissenschaften e.V.

Lugar: Munich ALEMANIA, Editor: Viola Kuestner Max-Planck Institute fuer Metallforschung Heisenbergstr. 3 70569 Stuttgart GERMANY; Año: 2006 vol. 97 p. 1093 - 1097

0044-3093

In the present work we study the phase transformation reaction of a Cu-20 Zn-7 Al (wt.%) alloy by isothermal and non-isothermal in situ X-ray diffraction. An effective activation energy for each phase is obtained for the range between 275 and 395 °C. The experimental data are also adjusted with the JMA equations. Finally, we present the T-T-T(time-temperature-transformation) diagram corresponding to the precipitation of alpha and gamma for the lower temperatures. Below 340 °C, we found for this alloy that the gamma phase precedes the formation of alpha.